Please help Quick! Carb Question!!

[joehahn]

Just paid more than I wanted to at dealer having carbs rebuilt. 2 weeks later I am having same problem with inability to get going, stalling, just plain dieing. Had to push undriveable car into brother-in-law's driveway. Called dealer who I thought would be cool and got the "we'll take a look" B.S. routine. Service guy said "have you put gas in it lately?" I said yes and, in fact, it was one of those places that you have to jam the nozzle down the tank, hold trigger over and over. He said he was "sure I kicked up some sediment or something" in that smug dealer tone. So now I am screwed and need quick advice as I have to move car ASAP. I can sit here for 4 hours and wait for AAA. Get it towed to dealer for $100 or... is there a quick lesson someone could give me on pulling jet and looking at it to see if it is the problem? I vaguely remember a post last week that had a diagram etc. ANY help at this moment would be great. Wonderful ****** Monday morning.

Thanks,

Joe 68L

[Zendalar]

Take off the fuel hose from the carbs and blow it =) Yes, do that and then have someone listen for bubbles in the tank. That way you find out if the fuel lines are full of goo. Other things you could do is that remove the idle/main jets and see if there is the problem. In 4 hours you could remove the carbs and clean them thoroughly

Heres the address though to the exploded view

http://www.pelicanparts.com/914/Parts/914-6/914-6_weber4_big.htm

//Zen

[joehahn]

...Brother in law says car O.K. in driveway and he will help me drag it home so I have bought time. Therefore I can take it home and really get a look at it. Zen, what do bubbles in the tank tell me? I am pretty sure I stirred up crap in the tank and that a removal and recondition is imminent. How do I fix the problem for now? Can I pull out jets and tell anything? I recall people talking about blowing compressed air through them. Is it easy to yank out jet, blow through it and put it back on? Which jet??? Should I just have it towed back to local Porsche dealer? Zen, I may email you privately for more info. I see you are in Finland. I am in Ohio, perhaps you could swing by and show me what I am doing? I would give you a beer to make it worth your while.

[joehahn]

bump...

I'll amend my post (in the interest of generating a response) to simply: Is there an easy way to figure out if my problems stem from a clogged jet? If so, might someone please let me know an idiot proof (if there is one) way to do it and return the carb back to the way it was. 40 IDAs Fresh rebuild lasted all of 3 weeks.

[Rot 911]

Joe, don't panic and think methodically. First off, do you have a fuel filter(s) on the car? If not, you may very well have clogged jets. If you have filters, you may just have clogged filters. Remove them one at a time. Either blow or use compressed air to force air back into the tank. This will tell you if you have a clogged fuel line. Hear bubbles? Ok, line is clear. Install new filter(s). Hook all lines back up. Next, pull line at carbs. Point line into can or jar. Have friend/helper turn key to on position, but not starting. Does gas come out in copious amounts? Ok all lines are clear. If not, is your fuel pump working? Hook up all lines. Keeping key on, but not starting, have friend pump gas or do it yourself at the linkage. See gas shooting into intakes? The jets are most probably clear, at least the main jets, you might have clogged secondaries. Now see if car starts. If it does, problem solved, if not, now start looking at your jets. Of course this assumes you have spark at the spark plugs, good points, condensor (if used), rotor and distributor cap. Remember, always start with the easiest solution and work up to the hard.

Kurt V
72 911E

[warment]

Joe,

I would check the fuel filter first. If it is dirty/rusty, you need to drain your tank and take it to a radiator shop and have them "boil" the rust out. I guess they do some kind of high temp pressure washing. Then you need to buy some sloshing compound(also known as rubberized gas tank sealer or something like that.) and put it in the tank after it is completely dry and slosh it around. You can buy this stuff from Performance Products or Tweeks. I am almost positive that Tweeks has it.

While you have the tank off, be sure and clean the screen on the outlet hose that runs to the engine...mine was pretty dirty on my 73. Also, while you have everything detached, blow some air through the metal fuel lines that run through the car and see if anything comes out.

My guess is that you have a rusty tank like I did. The car begins to miss, then sputters badly, then dies when the flow is really restricted. In addition, you may want to replace your fuel pump while you are doing this too for good measure.

Bill

Bill

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William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

[joehahn]

...thanks fellas. Bill, we spoke about this a month or so ago. I was too embarrassed to tell you that I had a nervous breakdown futzing with everything, gave up, had it towed to dealer and got my eyes ripped out.

I knew I would have to address tank but I hoped I could make it until the winter and do it then. (shoot me). What I am wondering now is whether or not the $$$ I spent on Carb repairs, setting, etc is now wasted because more crap got in them. I will try the fuel line analysis tonight and if that doesn't work I will beg for more help re: jet removal tomorrow.

Thanks for addressing my questions.

Joe

[warment]

Joe,

I am sure nothing is damaged, since you probably have a screen at the tank, and a filter at the engine. Everything is cool. Sooner or later, the tank will have to be serviced. If you are smart and do the work yourself(which I wasn't), you could probably have the tank cleaned for less than $100, buy the sealant for less than $50, replace the fuel filter for less than $50, and it would probably only take you 1-3 hours of free time. Removal of the gas tank is really easy, just make sure to disconnect the lines before anything else(those damn banjo style fittings are expensive and are delicate when they are old). I would also recommend replacing the soft fuel lines in the engine compartment if you haven't done so already...those things crack and start to leak. While you got everything torn up, you might as well repair the problem areas that you will have soon if you don't have them already. Good luck with the fixes!

Bill

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William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout